Question about 1986 Honda XR 250 R

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Dirt bike cam shain tensioner

Hello i need help with my dirt bike how do i loosen the chain tensioner because i bought a new camshaft and i need to get the chain to go a little bit higher

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  • 22 Answers

You must remove the entire tensioner and leave it out while you swap out the sprocket. Set it to it most retracted position and then install. Adjust it after it is installed. Make sure you have some slack or you will break the chain.

Posted on Feb 10, 2014

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Posted on Jan 02, 2017

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SOURCE: can a motorcycle cam chain be installed without

No not unless you split the chain(not reccomended),if your changeing the chain i would suggest new chain tensioners frt and rear cyl. they where known to go bad,i replaced mine in my interceptor and my v65 magna.

Posted on Apr 07, 2009

rockitman187
  • 2559 Answers

SOURCE: 83 vf750f - engine rebuild questions

From another Honda guy,If it ain't broke don't fix it.(If you paid for a total rebuild,They would only replace what is bad)

Posted on May 20, 2009

daltonp
  • 361 Answers

SOURCE: Hello, I have a 1985 cbx 550 f with loud cam chain

sorry to tell you this but it might be the head. This model ran a no bearing head for the cams and they wear out. If it is the chain you got lucky, there are after market quality chains and tensioners out there

Posted on Apr 18, 2010

  • 921 Answers

SOURCE: Cam chain tensioners

i replaced mine on my cbr f1 with a salvaged one... a couple of bolts and it took me 20 minutes with fairings off. it was a good thing i replaced it, because the old one was worn down really bad, and its was wobbly. I heard that if you use an aftermarket and you don't know what your doing you could cause damage. can i get some feedback, thanks

Posted on Apr 27, 2010

heimlich
  • 1978 Answers

SOURCE: vt500 c ticking sound. Cam chain tensioners

You have a self adjusting cam chain tensioner. It is sold as an assembly. Take out the complete unit and replace it with a new one. The springs are not bad , the device that keeps the pressure on the tensioner is slipping causing a ticking sound.

Posted on May 16, 2010

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Timing chain issues


Sounds like you could have bent/dropped a valve, causing cam shaft to seize and break the chain. Can you turn the cam shaft? Do the valves move properly?

Apr 01, 2014 | KTM 530 EXC-R Motorcycles

Tip

StarTrac NXT Chain Tensioning & Alignment Video


About This Video


Adjusting Chain Tension and Alignment on a StarTrac NXT


  • In this video, we show how to tension and align the chain and flywheel on a StarTrac NXT bike


  • First you see an example of a chain that is way too loose


  • To correct this loosen the flywheel bolt on both sides of the flywheel


  • Loosen the tension nut on the sprocket side of the bike and tighten the tension bolt until you get the proper deflection on the chain



    • A properly tensioned chain will have roughly 3/16" of deflection




  • Tighten the tension nut and the flywheel nut on both sides as shown in the video


Check the Alignment of the Chain and Sprockets after Making a Chain Tension Adjustment


  • Misaligned chains will look like they are walking from side to side where they enter and leave the sprockets



    • This can cause noise, premature wear, as well as making the chain look to be jumping from side to side during use




  • To correct this, loosen the flywheel nut on both sides of the flywheel, then loosen the tension nut and adjust the tension bolt to move the flywheel in the proper direction needed to align the chain with the flywheel sprocket, as seen in the video



    • Note: If you have already achieved proper tension of the chain, adjusting the tension nut on the opposite side from the sprocket will help to keep the same tension on the chain




  • Don't forget to check the chain tension after making an alignment adjustment




Chain Tensioning Alignment Video for StarTrac NXT Bike

on Feb 11, 2015 | Startrac Fitness Products Star Trac 4410HR...

2 Answers

Need timing gear marks for 2004 Kia Sadona 3.5L engine



Removal & Installation

3.5L Engine

  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Record the radio anti theft code data.
  3. Remove or disconnect the following:

    Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
  4. Support the engine with a floor jack and remove the engine mount.
  5. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.

    0996b43f8022cb71.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Timing belt routing and timing marks-3.5L Engine

  6. Remove or disconnect the following:

    Auto tensioner Timing belt

    0996b43f8022cb72.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Timing belt and related components-3.5L Engine


To install:
  1. Ensure that the engine is set to Top Dead Center (TDC).
  2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
  3. Install the timing belt in the following order:
    1. Crankshaft sprocket
    2. Idler pulley
    3. Left bank exhaust camshaft sprocket
    4. Left bank intake camshaft sprocket
    5. Water pump pulley
    6. Right bank intake camshaft sprocket
    7. Right bank exhaust camshaft sprocket
    8. Tensioner pulley

  4. Install the auto tensioner. Do not remove the retaining pin at this time.
  5. Check that the crankshaft and camshaft timing marks are aligned correctly.
  6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
  7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
  8. Loosen the tensioner pulley center bolt.
  9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).

    0996b43f8022cb73.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Adjusting the tensioner pulley-3.5L Engine

  10. Remove the auto tensioner retaining pin.
  11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
  12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.

    0996b43f8022cb74.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Measuring the auto tensioner rod-3.5L Engine

  13. When the auto tensioner measurement is correct, install or connect the following:

    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
  14. Reprogram the radio anti theft codes.

    Kia_Sedona_2002-2006
    Timing Chain, Sprockets, Front Cover & Seal

    Print


    Removal & Installation

    3.8L Engine

    1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
    2. Record the radio anti theft code data.
    3. Remove the engine from the vehicle.
    4. Remove the drive belt. Remove the power steering pump. Remove the air conditioning compressor.
    5. Remove the alternator. Remove the drive belt idler. Remove the drive belt tensioner. Remove the water pump pulley. Remove the intake manifold.
    6. Remove the connector bracket from the left cylinder head cover. Disconnect the right ignition coil connector, condenser connector and remove the bracket.
    7. Remove the left cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    8. Remove the right cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    9. Set the No. 1 cylinder to TDC on the compression stroke. Turn the crankshaft pulley and align its groove with the timing mark T of the lower timing chain cover.
    10. Check that the mark of the camshaft timing sprockets are in straight line positioning on the cylinder head surface. If not rotate the crankshaft 360 degrees. Do not rotate the engine counterclockwise.
    11. Remove the oil pan. Remove the crankshaft damper pulley. Remove the timing chain cover.
      NOTE Be careful not to damage the contact surfaces of the cylinder block, cylinder head and timing chain cover. Before removing the timing chain, mark the right and left timing chains with an identification mark based on the location of the sprocket because the identification mark on the chain for TDC can be erased.
    12. After compressing the timing chain tensioner, install a set pin. Remove the right cam to cam guide. Remove the right timing chain auto tensioner and timing chain tensioner arm.
    13. Remove the oil pump chain cover. Remove the oil pump chain tensioner assembly. Remove the oil pump chain guide. Remove the right timing chain.
    14. Remove the right timing chain guide. Remove the oil pump chain sprocket and oil pump chain. Remove the crankshaft sprocket, oil pump and camshaft drive gear.
    15. Remove the left cam to cam guide. Remove the left timing chain auto tensioner and timing chain tensioner arm. Remove the left timing chain.
    16. Remove the left timing chain guide. Remove the crankshaft sprocket and left camshaft drive. Remove the tensioner adapter assembly.

      0996b43f8020193b.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing chain and related components-3.8L Engine


    To install:
    1. Check the camshaft and crankshaft sprockets for wear and damage, replace as required.
    2. Inspect the tensioner arm and chain guide for wear and damage, replace as required.
    3. Check that the tensioner pin moves smoothly when the ratchet pawl is released with a thin rod.
    4. The key of the crankshaft should be aligned with the timing mark of the timing chain cover. This indicates that the piston is at TDC on the compression stroke.
    5. Install the tensioner adapter assembly. Install the crankshaft sprocket and left camshaft drive.
    6. Install the left timing chain guide and torque the retaining bolts 14-18 ft. lbs.
    7. Install the left timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, timing chain guide, exhaust camshaft sprocket, intake camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.

      0996b43f80201924.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Left timing chain markings and installation: (D) exhaust camshaft sprocket (C) intake camshaft sprocket-3.8L Engine

    8. Install the left timing chain tensioner arm and torque the retaining bolts 14-16 ft. lbs.
    9. Install the left timing chain tensioner and torque the retaining bolts 7-9 ft. lbs.
    10. Install the left cam to cam guide and torque the retaining bolts 7-9 ft. lbs.
    11. Install the crankshaft sprocket, oil pump and right camshaft drive.
    12. Install the oil pump chain and oil pump sprocket. Torque the retaining bolt to 14-16 ft. lbs.
    13. Install the right timing chain guide. Torque the retaining bolts to 14-18 ft. lbs.
    14. Install the right timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, intake camshaft sprocket, exhaust camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.

      0996b43f80201925.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Right timing chain markings and installation: (C) exhaust camshaft sprocket (B) intake camshaft sprocket-3.8L Engine

    15. Install the right timing chain tensioner arm. Torque the retaining bolts to 14-17 ft. lbs.
    16. Install the right timing chain auto tensioner. Torque the retaining bolts to 7-9 ft. lbs.
    17. Install the right cam to cam guide and torque the retaining bolts to 7-9 ft. lbs.
    18. Install the oil pump chain guide. Torque the retaining bolts to 7-9 ft. lbs.
    19. Install the oil pump tensioner assembly. Torque the retaining bolts to 7-9 ft. lbs.
    20. Pull out the pins on both the left and right hydraulic tensioners. Install the oil pump chain cover.
    21. Rotate the crankshaft two revolutions in the clockwise direction. Confirm the timing mark. Be sure to rotate the crankshaft in the clockwise direction.
    22. Apply sealant on the chain cover and on the cylinder head, cylinder block, and lower oil pan. Be sure these parts are free of engine oil and dirt.
      NOTE Before assembling the timing chain cover, the liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.


      0996b43f80201926.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Sealant application (1 inch bead width)-3.8L Engine

    23. Apply sealant on the chain cover.
      NOTE The liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.


      0996b43f80201927.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover sealant application-3.8L Engine

    24. Install a new gasket to the timing case cover.
      NOTE It is important that the dowel pins on the cylinder block and holes on the timing chain cover should be used as a reference in order to assemble the timing chain cover in the correct position.


      0996b43f80201928.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover gasket installation (A) gaskets-3.8L Engine

    25. Install the timing chain cover. Torque the retaining bolts in the proper sequence and to specification. The engine should not be started for at least thirty minutes after timing chain cover assembly.

      0996b43f80201929.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover bolt torque sequence and specification-3.8L Engine

    26. Install the timing case cover oil seal.
    27. Continue the installation in the reverse order of the removal procedure.

May 19, 2012 | 2004 Kia Sedona

1 Answer

Hi my name is Scott & I need to know.How do i tighten the chain on my bike.I Know I got to loosen the axle bolt,I need to know what to do with the chain tension bolts please HELP...


There are usually marks on the tension bolt brackets. Adjust each side until they are even and the chain has about a 1/4 inch to a 1/2 inch of slack in either direction at the chains longest span. Tighten the axle bolt securely and take it for a ride. Thanks for checking out Fixya.com Scott. I hope this helps you. Love them dirt bikes.

Jul 09, 2011 | 2003 Yamaha YZ 125

1 Answer

I am trying to determine if the adjustment bolt located below the carbs between the second and third cylinders is for setting the cam chain tension and how to set it . There is some cam chain noise at low...


Yes, it is the cam chain tensioner. With the engine off, just loosen the tensioner lock bolt then strongly tap a few times on the tensioner casing with a screwdriver handle. This will free up the spring loaded tensioner. Now just re=tighten the tensioner lock bolt and you're done. Please rate my answer. Thanks. tombones49_157.gif

Jun 05, 2011 | Yamaha XJ 650 Motorcycles

2 Answers

During Idle my TTR-125 Yamaha Dirt Bike makes a consistent clicking sound. Not sure if it's faulty pistons or what. Eventually the bike idols down. What's the Deal I'm going crazy... someone assist me...


From what you are describing,it may either rocker arm/valve adjustment or check,or the cam chain tensioner adjustment or replaced.just recently had to replace cam chain tensioner on a 92 gsx600f katana,because cam chain tensioner was worn out,it had made this constant clicking/rattle noise.after new replacement purrd like a kitten,hope this helps out.

Feb 21, 2011 | 2003 Yamaha TT-R 125 L

1 Answer

How do i tension the chain ?


Loosen the rear axle nut, turn the adjuster screws on both sides of axle evenly until chain has approximately 3/4" on street bikes, 2" on dirt bikes. Be sure to rotate the wheel to find the tightest point in the chain, (chains stretch unevenly), and make your adjustment at that point. Re-tighten the axle nut and tensioner jamb nuts if present.

Oct 30, 2010 | Honda VFR 800 ABS Motorcycles

2 Answers

Suzuki DR650RS Camshaft is broken into two parts. what could be the reason for breaking axles


In normal operation, there is no way the chain or valve springs could break a shaft. The only possibility, other than a defective camshaft when the bike was new, is that the cam chain was so loose the slack bound up around the sprocket causing enough pressure to break the shaft. Replace the chain, sprocket and camshaft and check the operation of the cam chain tensioner assembly. Please rate my answer.
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Feb 20, 2010 | 1990 Suzuki DR 650 RS

1 Answer

Engine was brought to me in a box have everthing to gether but not sure i have the timing right


Set the crankshaft's T mark right across the mark on the crankcases and place the cam shafts with their marks looking outwards (I think). Inlet camshaft's IN mark should look towards the rear of the bike and exhaust camshaft's EX mark should look towards the front wheel.After placing the chain (not the tensioner) push it from the tensioner's hole with a screw driver to check if the marks are in line with the cylinder's head surface.Bolt down the camshafts to the specific torque.Then put the chain tensioner.

May 27, 2009 | 2001 Yamaha YZ 426 F

1 Answer

Could you guys illustrate to us the correct timings for the camshaft of kxf25o dirt bike? We can't seem to fire up the bike hope to hear from you we are eager to fire up the bike. Thanks


Set your piston at TDC (top dead center), align the dots on the cam gears parallel with the top gasket surface of the cylinder head, then install your cam chain. Install and set your tensioner assembly. Your engine should now be in time. Turn the engine over one full cycle, re-check your cam timing, and adjust if nessesary.

Dec 06, 2008 | 2005 Suzuki RM-Z 250

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